12CrMo - GB /T 17107-1997

Grade	12CrMo
Corresponding Standard	GB /T 17107-1997 Structural Steel Grades and Mechanical Property for Forgings
Classification	Alloy Steel

12CrMo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.08	0.17	0.4	-	-	0.4	-	-	0.4
Maximum Value	0.15	0.37	0.7	0.035	0.035	0.7	0.3	0.3	0.55

• High-quality steel——P≤0.035；S≤0.035；Cu≤0.3；Cr≤0.3；Ni≤0.3
• Extra-quality steel （Suffix A）——P≤0.025；S≤0.025；Cu≤0.25；Cr≤0.3；Ni≤0.3
• Special High-Quality Steel (Suffix E)——P≤0.025；S≤0.015；Cu≤0.25；Cr≤0.3；Ni≤0.3

12CrMo Mechanical Properties

diameter or thickness d mm	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d≤100	Sample Direction: Longitudinal	Normalizing + tempering	≥440	≥275	≥20	≥50	≤159	≥55
100＜d≤300	Sample Direction: Longitudinal	Normalizing + tempering	≥440	≥275	≥20	≥45	≤159	≥55

• The forgings must be inspected for mechanical properties after performance heat treatment and before any surface treatment.
• After the samples are removed, no heat treatments that affect the mechanical properties or any processing that influences the test results shall be conducted.
• Mechanical property testing primarily evaluates the material\'s tensile strength, impact resistance, and hardness. When conducting tensile, impact, and hardness tests simultaneously, the hardness value is for reference only. Alternatively, one may choose to perform only one of the tensile, impact, or hardness tests.

1 Approximate Comparison Table Structural Alloy Steel

China		United States	Germany		France	Russia	Sweden	United Kingdom
GB	ISC	ASTM/AISI	DIN EN/DIN	W-Nr.	NF EN/NF	GOST	SS₁₄	BS EN/BS
12CrMo 12CrMoV	A30122 A31122	4119	13CrMo44	1.7335	12CD4	12ХМ 12ХМФ	2216	1501-620Cr27

2 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
12CrMo	SFVAF12	A387Gr.12 Gr.P12	F32 P32	13CrMo4-4	15CD2.05 15CD4-05 15CD4-5	13CrMo4-5	1.7335	12KHM 15KHM	2216	620 620-440 620Gr.27

3 Approximate Comparison Table Structural Alloy Steel

China	Japan	United States	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ASTM	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS	BS EN/BS
12CrMo	SCMV4	A387Gr.22 Gr.P22	F34 P34 TS34	10CrMo9-10	10CD9-10 12CD9-10	10CrMo9-10	1.7380	10KH2M	2218	622 622Gr.31

4 Approximate Comparison Table Structural Alloy Steel

China	United States
GB	ASTM/AISI
12CrMo	A335 Grade P11 A335 Grade P12

12CrMo Corresponding Standards(Same grade name, different standards)

1	GB /T 3077-1999
	12CrMo A30122
2	GB /T 17107-1997
	12CrMo
3	GB 6479-2013
	12CrMo A30122
4	GB /T 3077-2015
	12CrMo A30122
5	NB /T 47008-2017
	12CrMo
6	GB /T 37601-2019
	12CrMo

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!